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            <h5 class="mb-0 text-white">黑马前端</h5>
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              <h5 class="h3 font-weight-400 mb-0 text-white">Students</h5>
              <span class="text-sm text-white opacity-8">一共有 <b class="total">0</b> 位学员</span>
            </div>
            <div class="col-md-6 d-flex align-items-center justify-content-between justify-content-md-end">
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            <div class="card card-fluid">
              <div class="table-responsive" style="min-height: 1000px">
                <table class="table align-items-center">
                  <thead>
                    <tr>
                      <th>姓名</th>
                      <th>年龄</th>
                      <th>性别</th>
                      <th>组号</th>
                      <th>期望薪资</th>
                      <th>就业薪资</th>
                      <th>籍贯</th>
                      <th>操作</th>
                    </tr>
                  </thead>
                  <tbody class="list">
                    <!-- <tr>
                      <td>张杰</td>
                      <td>20</td>
                      <td>男</td>
                      <td>第2组</td>
                      <td>10000</td>
                      <td>13000</td>
                      <td>北京北京市东城区</td>
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  </div>
  <!-- add Modal -->
  <div class="modal fade" data-id="add" id="modal">
    <div class="modal-dialog modal-lg">
      <div class="modal-content">
        <div class="modal-header">
          <h5 class="modal-title">添加/编辑学员</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
        </div>
        <div class="modal-body">
          <form id="form" class="g-3 row" autocomplete="off" novalidate>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">姓名：</label>
                <input type="text" name="name" class="form-control" placeholder="请输入姓名" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">性别：</label>
                <div class="input">
                  <div class="form-check d-inline-block">
                    <input value="0" checked id="cb01" class="form-check-input" type="radio" name="gender" />
                    <label for="cb01" class="form-check-label">男</label>
                  </div>
                  <div class="form-check d-inline-block">
                    <input value="1" id="cb02" class="form-check-input" type="radio" name="gender" />
                    <label for="cb02" class="form-check-label">女</label>
                  </div>
                </div>
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">年龄：</label>
                <input type="text" name="age" class="form-control" placeholder="请输入年龄" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">组号：</label>
                <input type="text" name="group" class="form-control" placeholder="请输入1-8组号" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">期望薪资：</label>
                <input type="text" name="hope_salary" class="form-control" placeholder="请输入期望薪资" />
              </div>
            </div>
            <div class="col-sm-6">
              <div class="form-group">
                <label class="input-group-label">就业薪资：</label>
                <input type="text" name="salary" class="form-control" placeholder="请输入就业薪资" />
              </div>
            </div>
            <div class="col-sm-12">
              <div class="form-group">
                <label class="input-group-label">籍贯：</label>
                <div class="input pl-0">
                  <select class="form-select custom-select" name="province">
                    <option value="">--省份--</option>
                  </select>
                  <select class="form-select custom-select" name="city">
                    <option value="">--城市--</option>
                  </select>
                  <select class="form-select custom-select" name="area">
                    <option value="">--地区--</option>
                  </select>
                </div>
              </div>
            </div>
          </form>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">取消</button>
          <button type="button" class="btn btn-blue" id="submit">确认</button>
        </div>
      </div>
    </div>
  </div>
  <script src="./bootstrap/bootstrap.min.js"></script>
  <script src="./lib/axios.js"></script>
  <script src="./lib/form-serialize.js"></script>
  <script src="./js/common.js"></script>
  <script>
    //渲染学生信息
    async function renderList() {
      //获取学生信息
      const { data: studentList } = await axios.get('/students')
      console.log('学生信息--数组', studentList);

      //渲染学生信息
      let str = ''
      studentList.forEach(element => {
        str += `<tr>
                      <td>${element.name}</td>
                      <td>${element.age}</td>
                      <td>${element.gender === 0 ? '男' : '女'}</td>
                      <td>第${element.group}组</td>
                      <td>${element.hope_salary}</td>
                      <td>${element.salary}</td>
                      <td>${element.province} ${element.city} ${element.area}</td>
                      <td>
                        <a href="javascript:;" class="text-success mr-3"><i class="bi bi-pen" data-id="${element.id}"></i></a>
                        <a href="javascript:;" class="text-danger"><i class="bi bi-trash" data-id="${element.id}"></i></a>
                      </td>
                    </tr>`
      });
      document.querySelector('tbody').innerHTML = str
    }

    renderList()

    //删除学生
    document.querySelector('tbody').addEventListener('click', async function (e) {
      if (e.target.classList.contains('bi-trash')) {
        // console.log('单击了删除');
        const id = e.target.dataset.id
        // console.log(id);

        try {
          await axios.delete(`/students/${id}`)
          renderList()
        } catch (error) {
          alert('删除失败')
        }
      }
    })


    /******************三、添加学生*********************/
    // 3.1 单击“+”弹出模态框
    // 1】获取模态框盒子
    const modalBox = document.querySelector('#modal')
    // 2】创建模态框对象
    const modal = new bootstrap.Modal(modalBox)
    // 3】调用方法，控制显示和隐藏(show()显示/hide()隐藏)---一会马上就注释掉（测试代码）
    // modal.show()
    // setTimeout(function () {
    //   modal.hide()
    // }, 3000)
    document.querySelector('#openModal').addEventListener('click', function () {
      //显示模态框
      modal.show()
      //修改标题
      document.querySelector('.modal-title').innerHTML = '添加学员'
      //清空模态框盒子中的数据
      modalBox.querySelector('form').reset()

      modalBox.dataset.id = 'add'
    })


    // 3.2 省市区联动
    // 获取3个下拉列表元素对象
    const pSelect = document.querySelector('[name="province"]')
    const cSelect = document.querySelector('[name="city"]')
    const aSelect = document.querySelector('[name="area"]')
    // 1】获取所有的省份并渲染
    initProvince()
    async function initProvince() {
      // 获取省份数据
      const { data: pArr } = await axios.get('/api/province')
      console.log('省份数据---数组', pArr)
      // 渲染省份数据到下拉列表中
      let str = ''
      pArr.forEach(item => {
        str += `<option value="${item}">${item}</option>`
      })
      // 所有选项的前面，放一个空选项
      pSelect.innerHTML = '<option value="">--省份--</option>' + str
    }

    pSelect.addEventListener('change', async function () {
      //区变--选项要清空
      aSelect.innerHTML = `<option value="">--区县--</option>`
      //市变--选项要换成当前省份下的城市（发送请求获取当前省份的城市数据并渲染）
      const { data: cArr } = await axios.get('/api/city', {
        params: {
          //当前省份的值
          pname: pSelect.value,
        },
      })
      console.log('城市数组', cArr);
      //渲染城市数据到下啦列表中
      let str = ''
      cArr.forEach(item => {
        str += `<option value="${item}">${item}</option>`
      })
      //所有选项前放一个空选项
      cSelect.innerHTML = '<option value="">--城市--</option>' + str
    })

    cSelect.addEventListener('change', async function () {
      const { data: aArr } = await axios.get('/api/area', {
        params: {
          pname: pSelect.value,
          cname: cSelect.value,
        },
      })
      console.log('区县数组', aArr);
      //渲染城市数据到下啦列表中
      let str = ''
      aArr.forEach(item => {
        str += `<option value="${item}">${item}</option>`
      })
      //所有选项前放一个空选项
      aSelect.innerHTML = '<option value="">--区县--</option>' + str
    })

    //给确定按钮注册单击事件  添加学生
    document.querySelector('#submit').addEventListener('click', async function () {
      const form = modalBox.querySelector('form')
      const data = serialize(form, { hash: true })

      data.age = +data.age
      data.gender = +data.gender
      data.group = +data.group
      data.hope_salary = +data.hope_salary
      data.salary = +data.salary

      console.log(data);

      if (modalBox.dataset.id === 'add') {
        try {
          await axios.post('/students', data)
          renderList()
          modal.hide()
        } catch (error) {
          alert('添加学员失败')
        }
      }else{
        const id = modalBox.dataset.id
        try {
          await axios.put(`/students/${id}`, data)
          modal.hide()
          renderList()
        } catch (error) {
          alert('编辑学员失败')
        }
      }
    })

    //删除学生
    document.querySelector('tbody').addEventListener('click', async function (e) {
      //判断单击的是不是删除按钮   ---- 判断类名
      if (e.target.classList.contains('bi-trash')) {
        //获取学生id
        const id = e.target.dataset.id
        try {
          //调接口
          await axios.delete(`/students/${id}`)
          //重新渲染
          renderList()
        } catch (error) {
          alert('删除失败')
        }
      } else if (e.target.classList.contains('bi-pen')) {
        modal.show()
        document.querySelector('.modal-title').innerHTML = '编辑学员'

        const id = e.target.dataset.id
        modalBox.dataset.id = id

        const { data: studentInfo } = await axios.get(`/students/${id}`)
        console.log('学生详情', studentInfo)

        // 1】获取所有的表单项（都有name属性）
        const ipts = [...modalBox.querySelectorAll('form [name]')]
        // 2】遍历表单项
        ipts.forEach(ipt => {
          console.log('每一个表单项', ipt)
          //获取表单项对应的数据
          const k = ipt.name
          //console.log(k , studentInfo[k]);

          // 给表单项赋值---判断是不是性别的单选按钮
          if (k === 'gender') {
            // 设置被选中（性别单选按钮有2个，每个按钮都有自己的value，如果单选按钮的value和学生的gender值一致，则让其选中）
            if (+ipt.value === studentInfo.gender) {
              ipt.checked = true
            }
          } else {
            // 设置value
            ipt.value = studentInfo[k]
          }
        })

        const { data: cArr } = await axios.get('/api/city', {
          params: {
            //当前省份的值
            pname: pSelect.value,
          },
        })
        //渲染城市数据到下啦列表中
        let str = ''
        cArr.forEach(item => {
          str += `<option value="${item}">${item}</option>`
        })
        //所有选项前放一个空选项
        cSelect.innerHTML = '<option value="">--城市--</option>' + str
        cSelect.value = studentInfo.city

        // -------------------获取区的数据并渲染，给区下拉列表设置value即可--------------------------------------------
        const { data: aArr } = await axios.get('/api/area', {
          params: {
            pname: pSelect.value,
            cname: cSelect.value,
          },
        })
        // console.log('区县数据---数组', aArr)
        // 渲染区县数据到下拉列表中
        let str1 = ''
        aArr.forEach(item => {
          str1 += `<option value="${item}">${item}</option>`
        })
        // 所有选项的前面，放一个空选项
        aSelect.innerHTML = '<option value="">--区县--</option>' + str1
        aSelect.value = studentInfo.area
      }
    })
  </script>
</body>

</html>